Amorphous core-shell NiMoP@CuNWs rod-like structure with hydrophilicity feature for efficient hydrogen production in neutral media

Abstract

Using interface engineering, a highly efficient catalyst with a shell@core structure was successfully synthesized by growing an amorphous material composed of Ni, Mo, and P on Cu nanowires (NiMoP@CuNWs). This catalyst only requires an overpotential of 35 mV to reach a current density of 10 mA cm^–2. The exceptional hydrogen evolution reaction (HER) activity is attributed to the unique amorphous rod-like nature of NiMoP@CuNWs, which possesses a special hydrophilic feature, enhances mass transfer, promotes effective contact between the electrode and electrolyte solution, and exposes more active sites during the catalytic process. Density functional theory revealed that the introduction of Mo weakens the binding strength of the Ni site on the catalyst surface with the H atom and promotes the desorption process of the H₂ product significantly. Owing to its facile synthesis, low cost, and high catalytic performance, this electrocatalyst is a promising option for commercial applications as a water electrolysis catalyst.